CVE-2022-49549

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49549
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49549.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49549
Downstream
Related
Published
2025-02-26T02:14:00Z
Modified
2025-10-15T22:32:22.690561Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
x86/MCE/AMD: Fix memory leak when threshold_create_bank() fails
Details

In the Linux kernel, the following vulnerability has been resolved:

x86/MCE/AMD: Fix memory leak when thresholdcreatebank() fails

In mcethresholdcreatedevice(), if thresholdcreatebank() fails, the previously allocated threshold banks array @bp will be leaked because the call to mcethresholdremovedevice() will not free it.

This happens because mcethresholdremovedevice() fetches the pointer through the thresholdbanks per-CPU variable but bp is written there only after the bank creation is successful, and not before, when thresholdcreatebank() fails.

Add a helper which unwinds all the bank creation work previously done and pass into it the previously allocated threshold banks array for freeing.

[ bp: Massage. ]

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6458de97fc15530b54477c4e2b70af653e8ac3d9
Fixed
b4acb8e7f1594607bc9017ef0aacb40b24a003d6
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6458de97fc15530b54477c4e2b70af653e8ac3d9
Fixed
cc0dd4456f9573bf8af9b4d8754433918e809e1e
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6458de97fc15530b54477c4e2b70af653e8ac3d9
Fixed
9708f1956eeb70c86943e0bc62fa3b0101b59616
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6458de97fc15530b54477c4e2b70af653e8ac3d9
Fixed
396b8e7ab2a99ddac57d3522b3da5e58cb608d37
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6458de97fc15530b54477c4e2b70af653e8ac3d9
Fixed
e5f28623ceb103e13fc3d7bd45edf9818b227fd0

Affected versions

v5.*

v5.10
v5.10-rc1
v5.10-rc2
v5.10-rc3
v5.10-rc4
v5.10-rc5
v5.10-rc6
v5.10-rc7
v5.10.1
v5.10.10
v5.10.100
v5.10.101
v5.10.102
v5.10.103
v5.10.104
v5.10.105
v5.10.106
v5.10.107
v5.10.108
v5.10.109
v5.10.11
v5.10.110
v5.10.111
v5.10.112
v5.10.113
v5.10.114
v5.10.115
v5.10.116
v5.10.117
v5.10.118
v5.10.119
v5.10.12
v5.10.120
v5.10.13
v5.10.14
v5.10.15
v5.10.16
v5.10.17
v5.10.18
v5.10.19
v5.10.2
v5.10.20
v5.10.21
v5.10.22
v5.10.23
v5.10.24
v5.10.25
v5.10.26
v5.10.27
v5.10.28
v5.10.29
v5.10.3
v5.10.30
v5.10.31
v5.10.32
v5.10.33
v5.10.34
v5.10.35
v5.10.36
v5.10.37
v5.10.38
v5.10.39
v5.10.4
v5.10.40
v5.10.41
v5.10.42
v5.10.43
v5.10.44
v5.10.45
v5.10.46
v5.10.47
v5.10.48
v5.10.49
v5.10.5
v5.10.50
v5.10.51
v5.10.52
v5.10.53
v5.10.54
v5.10.55
v5.10.56
v5.10.57
v5.10.58
v5.10.59
v5.10.6
v5.10.60
v5.10.61
v5.10.62
v5.10.63
v5.10.64
v5.10.65
v5.10.66
v5.10.67
v5.10.68
v5.10.69
v5.10.7
v5.10.70
v5.10.71
v5.10.72
v5.10.73
v5.10.74
v5.10.75
v5.10.76
v5.10.77
v5.10.78
v5.10.79
v5.10.8
v5.10.80
v5.10.81
v5.10.82
v5.10.83
v5.10.84
v5.10.85
v5.10.86
v5.10.87
v5.10.88
v5.10.89
v5.10.9
v5.10.90
v5.10.91
v5.10.92
v5.10.93
v5.10.94
v5.10.95
v5.10.96
v5.10.97
v5.10.98
v5.10.99
v5.11
v5.11-rc1
v5.11-rc2
v5.11-rc3
v5.11-rc4
v5.11-rc5
v5.11-rc6
v5.11-rc7
v5.12
v5.12-rc1
v5.12-rc1-dontuse
v5.12-rc2
v5.12-rc3
v5.12-rc4
v5.12-rc5
v5.12-rc6
v5.12-rc7
v5.12-rc8
v5.13
v5.13-rc1
v5.13-rc2
v5.13-rc3
v5.13-rc4
v5.13-rc5
v5.13-rc6
v5.13-rc7
v5.14
v5.14-rc1
v5.14-rc2
v5.14-rc3
v5.14-rc4
v5.14-rc5
v5.14-rc6
v5.14-rc7
v5.15
v5.15-rc1
v5.15-rc2
v5.15-rc3
v5.15-rc4
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.15.1
v5.15.10
v5.15.11
v5.15.12
v5.15.13
v5.15.14
v5.15.15
v5.15.16
v5.15.17
v5.15.18
v5.15.19
v5.15.2
v5.15.20
v5.15.21
v5.15.22
v5.15.23
v5.15.24
v5.15.25
v5.15.26
v5.15.27
v5.15.28
v5.15.29
v5.15.3
v5.15.30
v5.15.31
v5.15.32
v5.15.33
v5.15.34
v5.15.35
v5.15.36
v5.15.37
v5.15.38
v5.15.39
v5.15.4
v5.15.40
v5.15.41
v5.15.42
v5.15.43
v5.15.44
v5.15.45
v5.15.5
v5.15.6
v5.15.7
v5.15.8
v5.15.9
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.17.1
v5.17.10
v5.17.11
v5.17.12
v5.17.13
v5.17.2
v5.17.3
v5.17.4
v5.17.5
v5.17.6
v5.17.7
v5.17.8
v5.17.9
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.18.1
v5.18.2
v5.7
v5.7-rc2
v5.7-rc3
v5.7-rc4
v5.7-rc5
v5.7-rc6
v5.7-rc7
v5.8
v5.8-rc1
v5.8-rc2
v5.8-rc3
v5.8-rc4
v5.8-rc5
v5.8-rc6
v5.8-rc7
v5.9
v5.9-rc1
v5.9-rc2
v5.9-rc3
v5.9-rc4
v5.9-rc5
v5.9-rc6
v5.9-rc7
v5.9-rc8

Database specific

vanir_signatures

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                "164244904082721218879848330700957632265",
                "331098942051249851830744378284498887195",
                "273326007964054498324616075715160172676",
                "229347368821456143251178312906799399619",
                "238739231928532082113053900871141745626",
                "145586822091903320296059980379640192617",
                "242901364224294792752817937710837152601",
                "200323716473515582835233269117231101540",
                "328069189620479232663549944267544045229",
                "32525972324408775302262888955998224502",
                "233573369716280333167622442838265028002",
                "217703139503395137815656086205449045721",
                "54683191847825533208805552969470786093",
                "243968537903120855237584826648371962651",
                "313930157053015999058878407718174198464",
                "282503508093702763332430824091456033615",
                "255503118194588309039742331020016560059",
                "158572846677813196321988215329322140143",
                "247663668690355698474957400885572903695",
                "176228870425705424720200444952518699547",
                "51656744509040908257010276911845323069",
                "196329885499182592979874845197918860724"
            ],
            "threshold": 0.9
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9708f1956eeb70c86943e0bc62fa3b0101b59616"
    },
    {
        "id": "CVE-2022-49549-bebc8f17",
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "target": {
            "file": "arch/x86/kernel/cpu/mce/amd.c",
            "function": "mce_threshold_remove_device"
        },
        "digest": {
            "function_hash": "259628308252731732372610212240595543055",
            "length": 350.0
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@396b8e7ab2a99ddac57d3522b3da5e58cb608d37"
    },
    {
        "id": "CVE-2022-49549-dd705481",
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "target": {
            "file": "arch/x86/kernel/cpu/mce/amd.c",
            "function": "mce_threshold_remove_device"
        },
        "digest": {
            "function_hash": "259628308252731732372610212240595543055",
            "length": 350.0
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@9708f1956eeb70c86943e0bc62fa3b0101b59616"
    },
    {
        "id": "CVE-2022-49549-ff5cabe7",
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "target": {
            "file": "arch/x86/kernel/cpu/mce/amd.c",
            "function": "mce_threshold_create_device"
        },
        "digest": {
            "function_hash": "286436873832572405640431805242475339441",
            "length": 661.0
        },
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e5f28623ceb103e13fc3d7bd45edf9818b227fd0"
    }
]

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.8.0
Fixed
5.10.121
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.46
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
5.17.14
Type
ECOSYSTEM
Events
Introduced
5.18.0
Fixed
5.18.3